<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>盒子阴影</title>
    <style>
        img{
            border-radius: 50%;
            /* 盒子阴影 */
            /* box-shadow: 2px 2px 2px 2px black; */
            /* 阴影出现时间为0.5s */
            transition: 0.5s;
        }
        img:hover{
            box-shadow: 0 15px 30px   rgba(0,0,0,0.1);
        }
    </style>
</head>
<body>
    <img src="./图片/sailuo.jpg" alt="">
</body>
</html>